William Warner of Bantry owned creameries at Killarney, Enniskeane and Ballinacarriga and developed a brand of butter aimed at the export market. In partnership with James Manders (son-in-law) who later left the partnership he started a factory at William Street.  By 1886 its production was £6,000 in the summer and employed a hundred men including fifty coopers. In 1892 it was producing 800 tons a year.

The Musgrave Cork family owners of the Super Valu Group are descended from Bantry Warners on the female side.